CVE-2025-43921 – cPanel WHM GNU Mailman Unauthenticated List Creation Vulnerability

The following table lists the changes that have been made to the
CVE-2025-43921 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Apr. 20, 2025

    Action Type Old Value New Value
    Added Description GNU Mailman 2.1.39, as bundled in cPanel (and WHM), allows unauthenticated attackers to create lists via the /mailman/create endpoint.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
    Added CWE CWE-863
    Added Reference https://code.launchpad.net/~mailman-coders/mailman/2.1
    Added Reference https://github.com/0NYX-MY7H/CVE-2025-43921
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